THE EVOLUTION OF SUSTAINABILITY ASSURANCE: A REVIEW OF ENVIRONMENTAL AND SOCIAL AUDITS
Purpose of the study: This study aims to examine the evolution and current practices of sustainability assurance, highlighting its role in enhancing the credibility of ESG disclosures and corporate sustainability reporting. It seeks to provide readers with a clear understanding of how assurance practices have developed, the challenges they face, and the emerging trends in this evolving field.
Methodology: A systematic review was conducted using peer-reviewed articles, institutional reports, and professional standards published between 1990 and 2025. Literature was synthesized thematically across three phases: early stage (pre-2000), institutionalization (2000–2015), and expansion and convergence (2016–present). Digital tools, structured analysis, and qualitative survey approaches were applied to extract trends and insights.
Main Findings: Sustainability assurance has progressed from voluntary, compliance-based audits to structured practices integrated into corporate governance. Key standards, including ISAE 3000 and AA1000AS, institutionalize systematic methodologies and stakeholder inclusion. Recent developments include convergence with financial auditing, the adoption of digital verification tools, and regulatory reforms such as the EU CSRD and IFRS S2, though methodological gaps and regional disparities persist.
Applications of this study: The findings are relevant to the disciplines of accounting, auditing, corporate governance, sustainability management, and ESG reporting. Practitioners, regulators, auditors, and policymakers can use the insights to enhance reporting credibility, guide assurance practices, and align corporate sustainability strategies with emerging global standards and technological innovations.
Novelty/Originality of this study: This study provides a comprehensive synthesis of sustainability assurance evolution, offering fresh insights into the integration of digital tools, global regulatory frameworks, and methodological harmonization. It contributes new knowledge on trends, challenges, and future directions, helping readers understand how assurance practices can advance accountability, reliability, and stakeholder trust in ESG reporting.
KEYWORDS: Sustainability assurance, ESG reporting, corporate governance, audit convergence, digital verification.
